 | Gregory Ratoff als Alexei Leshki |
 | Ronald Squire als Sir Charles Farringdon |
 | Binnie Barnes als Valerie Petrovna |
 | Tamara Desni als Marie-Louise |
 | Barry MacKay als Michael Farringdon |
 | Anthony Bushell als Rex Farringdon |
| Phil Rosen | Director |
| Richard Wainwright | Producer |
| Alma Reville | Screenplay |
| Dorothy Farnum | Adaptation |
| Joe Rock | Associate Producer |
| Hugh Stewart | Editor |
| Dennis Wheatley | Novel |
| Louis Levy | Original Music Composer |
| Charles Williams | Original Music Composer |
| Dorothy Farnum | Writer |
